Figure 1.

Progression of acute SARS-CoV-2 infection to postacute COVID-19. The figure shows the various forms of progression fo acute SARS-CoV-2 infection (classified using NIH symptom severity criteria [1]) to the proposed categories of postacute COVID-19, which include (1) persistent symptoms; (2) organ dysfunction; and (3) MIS. There is likely a relationship between organ dysfunction and persistent symptoms that is not yet completely understood. Abbreviations: COVID-19, coronavirus disease 2019; MIS, multisystem inflammatory syndrome; NIH, National Institutes of Health; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.